Edward burnet



(No Model.) E. BURNET.

ELECTRICAL BATTERY.

110.577.282. wdfeb. 16, 1897.

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, `trolytes and there shall be no communication pocket electric lamp with case.

shall'not escape, and that the terminals and "same height as the diaphragm uv and the rab "Nrrnn 5 Fries.

EDWARD'BURNET, oF wieAN, ENGLAND.

r.ELECTRICAL BATT E A 4SII?FltIIliIt'JAlIN forming part of Letters Patent No. p77,l28l2, dated February 16, 189'?.

Application filed November 30, 1895. Serial No. 570.577. (llo model.)

To all whom, it may concern,.-

Be itknown that I, EDWARD. BURNET, a subject of the Queen of Great Britain, resid-` ing at Wigan, in the count-y of Lancaster, in the Kingdom of England, have invented certain new and useful Improvements in Electrical Batteries, of which the following is a specification..

This invention has for its object a battery or compound cell applicable for a pocket electric lamp.v The invention is, however, applicable to almost all kinds of electric batteries, both primary andjsecondary.

The great desideratum of apock'et electric battery is that the liquids shall not upset or creep and that the fumes, if there be any,

connections shall be quite clear of theY elecbetween the two.

" My invention is best described by aid of the accompanying drawings, in which- Figure l is a section of my battery fora Fig. 1L is a detailview of upper portion of one of the car-` bons; Fig. 2, a section on the line Z-Z; Fig. 3, a plan of top olf-battery, the case being removed; Fig. 4:, a plan of lid and bottom of case.

Referring first to the battery proper, A is a double cell formed of ebonite or other suitable material and having a diaphragm a.

`B B are porous cups fitting with the compar'tments of cell A. These cups are of the bet e', hereinafter described.

C C are carbons of segmental circular crosssection and somewhat sin allerxin diameter than the porous cups, so as to allow the electrolyte to freely circulate. round them.

l) D are the zincs, also made in section, a segment of a circle.- It is obvious, however, that if the porous cells be of other forni than circular these carbons and zines must be of similar contour, so as to allow the two to approach together as near as practicable to keep down the internal resistance.

E is a tray of ebonite or other like material closely fitting into the socket in the top of cell A, formed by the cut-.out portion or rabbet c t. This tray has a flange e, projecting over the top edge of cell A and ittingclosely on it,

onto the coppered portion -and is screwed down tothe tray and a waterftight joint made between. Further, the crack round the car- This l bon in the trayis filled with paraffin, bitumen,

or. the like. The copper platingimmediately below the cap is then scraped away for a short distance, leaving, however, a band coppered below the portion thus bared. The space bared above the further belt of copper plating is covered and-saturated with paraffin. The coppering below, however, which is not covered by the paraffin, prevents the paraffin from creeping down onto the po'rtiou of the carbon in the cell.

The top of the cap of one of' the carbons is' connected to the terminal G by a metallic connection. The connection F is another similar cap on the other carbon, formed with in series. A large hole in the projecting plate of cap F is left r-ound the binding-post of the nearest zinc, in which hole insulating material is placed to prevent any connection between that zinc and the cap.- That zinc is connected by its metallic connection or bindin g-post with terminal H, the crack between the zinc and the metallic plate being lled with paraiin or bitumen, asin the case of the crack round the carbon, and the terminal of the zinc is screwed into a thickened portion on the .top and screwed down to the lid by means of a nut with preferably'an india-rub ber washer h below, so as to completely close the aperture round the connection.v There can be two screws, if desirable, fixed in this way, so as. to Ahold the zinc perfeotlyrigid, one 'of them only being used as a terminal.

I is the metallic case'for protecting the battery in the lpocket and for carrying it about.

Ico

8o 'aprojecting plate for connecting with .the 7 zinc ot' the other couple, so as to connect up means of removing the cell by pushing up from the bottom with the fingers. The lid is held down by the nuts N.

Any suitable electrolyte may be employed in the cell, but I prefer to employ a solution4 of sulfuric acid and Water for the excitant, and a mixture of chromic acid, hydrochloricacid solution, and potassium chlorate for the depolarizer.

It is obvious that this form of cell, espeeially the tray, whereby it is made absolutely Water-tight, can be-used for any kind of battery whatsoever, whether primary or secondary, and is a great advantage, as all the connections are in a chamber absolutely protected from the creeping of the salts of the electrolyte from the liquid and from gases. The peculiar arrangement, too, of the partially-circular plates enables one to form a battery of very small resistance in a very smallspaoe. The lid, too, being pressed down by means of the nuts N in the cover, holds the porous cells tightly in posit-ion, while the manner in which the electrodes are fixed' in place enables the battery to be subjectedto comparatively a rough shaking without any disturbance of the relativev positions of the parts. l

I declare that what I claim isl. In a batter the combination of a cell formed with a socket in its upper opened end, with the electrodes, and a tray supporting the electrodes and closely ttingwithin the socket and having a ange extending over the walls of the cell to prevent leakage into the tray, substantially as described. y

2. The combination of the cell having a socket or rabbet at top, the electrodes, the tray supporting the electrodes, and closely fitting Within the socket and formed Iwith a flange which projects over and hermetically seals the top of the cell, the lid-fitting closely upon the ange of the tray, and suitable con-A nections and terminals above the tray connected through it and the lid, whereby the connections are protected from the contents of the cell, substantially'as described.

3. The l1erein-described method of treating batte1y-carbons for preventing the creeping or spreading of paraffin, which consists in plating or forming upon the carbons adjacent to one end aband or ribbon of negative metal, and then parailining the end of the carbon above the plated portion, leaving the plated portion andthe part below free of paran, substantially as set forth.

4. The herein-described method of treating carbons for preventingthe creeping or spreading of paraffin, which consists in plating the upper ends of the carbons, removing a strip or portion of the plating, and paraining the upper end of the carbon and the portion from which the plating has been removed. substantially as set forth.

5. lhc hereinfdeseribed method of prepa ing battery-carbons which consists in plating the upper end of the carbon, brazing a metal cap or plate to the plated end of the carbon, removing a strip or portion of the plating from the carbon beneath the metal cap or strip, and iinally immersing the capped end of the carbon in paratin up to and including the portion from which the plating has been removed, substantially as set forth.

G. A battery-carbon naving a metallic cap or platesecured to its upper end, a portion plated with a negative metal below the cap' portion, and parafn above the tion, as set forth. i

`7. In a battery, the combination of the double cell, the tray supported in the cell, the-carplated por- -bons supported from and extending through the tray, the cap-pieces F F secured to the eo upper ends of the car-bons, ythe terminals G,

H electrically connected with the cap-pieces, and an Iextension from cap-piece F' to one of the zincs,substantially as setforth.

In testimony v whereof I have signed my nameto this specification in the presenceof tivo subscribing Witnesses.

J osHUA UNsWoR'rH, JOSEPH RICHARD PORTER. 

